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+title = "Cassandra"
+availability = "v2.3+"
+maintainer = "Community"
+description = "Scale applications based on Cassandra query results."
+layout = "scaler"
+go_file = "cassandra_scaler"
++++
+
+### Trigger Specification
+
+This specification describes the `cassandra` trigger that scales based on the results of a Cassandra query result.
+
+```yaml
+triggers:
+  - type: cassandra
+    metadata:
+      username: "cassandra"
+      clusterIPAddress: "cassandra.default.svc.cluster.local:9042"
+      consistency: "Quorum" # Optional: If not set by the user the default value will be `gocql.One`.
+      protocolVersion: "4" # Optional: If not set by the user the default value will be `4`.
+      keyspace: "testing" # Optional: Used for generating the metricName.
+      query: "SELECT COUNT(*) FROM testing.test_table;"
+      targetQueryValue: "1"
+      metricName: "test_table-count" # Optional: If not set by the user the generated value would be `cassandra-<KEYSPACE>`, or if keyspace is not set either the default value would be just `cassandra`.
+```
+
+**Parameter list:**
+
+- `username` - The username credential for connecting to the Cassandra instance.
+- `clusterIPAddress` - The IP address or the host name of the Cassandra instance, with port number (optional).
+- `consistency` - Configuration for a session or per individual read operation.
+- `protocolVersion` - CQL Binary Protocol.
+- `keyspace` - The name of the keyspace used in Cassandra.
+- `query` - A Cassandra query that should return single numeric value.
+- `targetQueryValue` - The threshold value that is provided by the user and used as `targetAverageValue` in the Horizontal Pod Autoscaler (HPA).
+- `metricName` - An optional name to assign to the metric. If not set KEDA will generate a name based on the `keyspace`. If using more than one trigger it is required that all metricNames be unique.
+
+### Authentication Parameters
+
+You can authenticate by using a password via `TriggerAuthentication` configuration.
+
+**Password Authentication:**
+
+- `password` - Password for configured user to login to the Cassandra instance.
+
+### Example
+
+```yaml
+apiVersion: v1
+kind: Secret
+metadata:
+  name: cassandra-secrets
+type: Opaque
+data:
+  cassandra_password: CASSANDRA_PASSWORD
+---
+apiVersion: keda.sh/v1alpha1
+kind: TriggerAuthentication
+metadata:
+  name: keda-trigger-auth-cassandra-secret
+spec:
+  secretTargetRef:
+  - parameter: password
+    name: cassandra-secrets
+    key: cassandra_password
+---
+apiVersion: keda.sh/v1alpha1
+kind: ScaledObject
+metadata:
+  name: cassandra-scaledobject
+spec:
+  scaleTargetRef:
+    name: example
+  triggers:
+  - type: cassandra
+    metadata:
+      username: "cassandra"
+      clusterIPAddress: "cassandra.default.svc.cluster.local:9042"
+      consistency: "Quorum"
+      protocolVersion: "4"
+      keyspace: "testing"
+      query: "SELECT COUNT(*) FROM testing.test_table;"
+      targetQueryValue: "1"
+      metricName: "test_table-count"
+    authenticationRef:
+      name: keda-trigger-auth-cassandra-secret      
+```